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fzus63 kmqt 272003
glfls 
200 

open lake forecast for lake superior
national weather service marquette mi
403 pm edt tue oct 27 2020

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...a 29.4 inch low moving through hudson bay is extending 
a 29.7 inch trough across northern ontario. this trough will 
cross lake superior tonight and leave wednesday. by thursday, 
30.2 inch high pressure will be building into northern ontario. it
will then drift southeastward across lake superior thursday night
and friday. on saturday, a 29.3 inch low is expected to move 
through northern ontario, dragging a 29.6 inch trough across lake 
superior saturday night. sunday will see a 30.5 inch high 
pressure move southeast across the central plains. this will bring
a ridge of at least 30.1 inches over lake superior sunday.

lsz162-280415-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
403 pm edt tue oct 27 2020 /303 pm cdt tue oct 27 2020/

...gale warning in effect through late tonight...

.late this afternoon...southwest gales to 40 knots. waves 8 to
11 feet occasionally to 14 feet. 
.tonight...southwest gales to 40 knots becoming west gales to
35 knots late. a slight chance of rain and snow showers through
midnight. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 6 to 9 feet occasionally to 11 feet. 
.wednesday...west winds 20 to 30 knots diminishing to 10 to
20 knots. a slight chance of snow showers through early
afternoon. a chance of rain showers. waves subsiding to 2 to
4 feet. 
.wednesday night...north winds 10 to 20 knots. a slight chance of
rain and snow showers after midnight. waves subsiding to 1 to
3 feet. 
.thursday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.friday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest
gales to 35 knots. waves building to 6 to 9 feet occasionally to
11 feet. 
.sunday...northwest gales to 35 knots becoming west 15 to
25 knots. waves subsiding to 2 to 4 feet. 

$$
fzus63 kmqt 272003
glfls 

lsz263-280415-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
403 pm edt tue oct 27 2020

...gale warning in effect through wednesday morning...

.late this afternoon...southwest gales to 40 knots. waves 9 to
12 feet occasionally to 15 feet. 
.tonight...southwest gales to 40 knots becoming west gales to
35 knots late. a slight chance of rain and snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet. 
.wednesday...west winds 20 to 30 knots diminishing to 15 to
25 knots late. a chance of rain showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.wednesday night...north winds 15 to 25 knots diminishing to
10 to 20 knots late. a slight chance of rain showers. waves
subsiding to 1 to 3 feet. 
.thursday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a slight chance of rain and snow
showers through early afternoon. waves subsiding to calm to
2 feet. 
.thursday night...north winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.friday night...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...southwest winds 20 to 30 knots becoming northwest
gales to 40 knots. a chance of snow showers. waves building to
8 to 11 feet occasionally to 14 feet. 
.sunday...northwest gales to 40 knots becoming west 15 to
25 knots. a chance of rain and snow showers. waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.

$$

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